Dichloroacetic acid

Golden State Water Company (GSWC) - Bell, Bell Gardens

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

128

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	0.538 ppb	16	5	ND - 2.20 ppb
2015	2.50 ppb	16	8	ND - 12.0 ppb
2016	ND	16	0	ND
2017	ND	16	0	ND
2018	0.438 ppb	32	7	ND - 4.40 ppb
2019	0.372 ppb	32	8	ND - 1.90 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-04	2706-800-1105	2.20 ppb
2014-02-04	2706-801-1045	ND
2014-02-04	2706-802-1055	ND
2014-02-04	2706-803-0950	2.00 ppb
2014-05-06	2706-800-1038	1.30 ppb
2014-05-06	2706-801-1018	ND
2014-05-06	2706-802-1029	ND
2014-05-06	2706-803-0922	1.80 ppb
2014-08-05	2706-800-1057	1.30 ppb
2014-08-05	2706-801-1035	ND
2014-08-05	2706-802-1045	ND
2014-08-05	2706-803-0937	ND
2014-11-04	2706-800-1112	ND
2014-11-04	2706-801-1050	ND
2014-11-04	2706-802-1100	ND
2014-11-04	2706-803-0937	ND
2015-02-03	2706-800-1022	1.50 ppb
2015-02-03	2706-801-1001	ND
2015-02-03	2706-802-1014	ND
2015-02-03	2706-803-0905	1.30 ppb
2015-05-05	2706-800-1045	1.70 ppb
2015-05-05	2706-801-1015	ND
2015-05-05	2706-802-1035	ND
2015-05-05	2706-803-0917	1.90 ppb
2015-08-04	0007-800-1048	12.0 ppb
2015-08-04	0007-801-1018	9.20 ppb
2015-08-04	0007-802-1036	6.00 ppb
2015-08-04	0007-803-0920	6.40 ppb
2015-11-03	2706-800-1056	ND
2015-11-03	2706-801-1030	ND
2015-11-03	2706-802-1045	ND
2015-11-03	2706-803-0935	ND
2016-02-02	2706-800-1042	ND
2016-02-02	2706-801-1104	ND
2016-02-02	2706-802-1053	ND
2016-02-02	2706-803-1015	ND
2016-05-03	2706-800-1107	ND
2016-05-03	2706-801-1003	ND
2016-05-03	2706-802-1022	ND
2016-05-03	2706-803-0906	ND
2016-08-02	2706-800-1106	ND
2016-08-02	2706-801-0956	ND
2016-08-02	2706-802-1010	ND
2016-08-02	2706-803-0900	ND
2016-11-08	2706-800-0916	ND
2016-11-08	2706-801-0900	ND
2016-11-08	2706-802-0909	ND
2016-11-08	2706-803-0758	ND
2017-02-07	9590-800-1109	ND
2017-02-07	9590-801-1011	ND
2017-02-07	9590-802-1026	ND
2017-02-07	9590-803-0915	ND
2017-05-02	9590-800-1029	ND
2017-05-02	9590-801-1008	ND
2017-05-02	9590-802-1021	ND
2017-05-02	9590-803-0911	ND
2017-08-01	9590-800-1036	ND
2017-08-01	9590-801-1025	ND
2017-08-01	9590-802-1009	ND
2017-08-01	9590-803-0917	ND
2017-11-07	9590-800-1043	ND
2017-11-07	9590-801-1025	ND
2017-11-07	9590-802-1035	ND
2017-11-07	9590-803-0932	ND
2018-02-06	9590-800-1103	ND
2018-02-06	9590-801-1052	ND
2018-02-06	9590-802-1032	ND
2018-02-06	9590-803-0904	ND
2018-02-06	9590-804-0926	ND
2018-02-06	9590-805-1155	ND
2018-02-06	9590-806-0821	ND
2018-02-06	9590-807-0810	ND
2018-05-01	9590-800-1034	ND
2018-05-01	9590-801-1009	ND
2018-05-01	9590-802-1025	ND
2018-05-01	9590-803-0848	ND
2018-05-01	9590-804-0913	ND
2018-05-01	9590-805-1132	ND
2018-05-01	9590-806-0803	ND
2018-05-01	9590-807-0750	ND
2018-08-08	9590-800-1021	ND
2018-08-08	9590-801-0958	ND
2018-08-08	9590-802-1009	4.40 ppb
2018-08-08	9590-803-0923	ND
2018-08-08	9590-804-0938	ND
2018-08-08	9590-805-1108	1.10 ppb
2018-08-08	9590-806-0854	2.40 ppb
2018-08-08	9590-807-0911	2.20 ppb
2018-11-07	9590-800-0953	1.000 ppb
2018-11-07	9590-801-0926	ND
2018-11-07	9590-802-0940	ND
2018-11-07	9590-803-0916	1.30 ppb
2018-11-07	9590-804-0907	1.60 ppb
2018-11-07	9590-805-1006	ND
2018-11-07	9590-806-0853	ND
2018-11-07	9590-807-0843	ND
2019-02-06	9590-800-0926	ND
2019-02-06	9590-801-0854	ND
2019-02-06	9590-802-0915	ND
2019-02-06	9590-803-0731	1.90 ppb
2019-02-06	9590-804-0758	1.20 ppb
2019-02-06	9590-805-1038	ND
2019-02-06	9590-806-0642	ND
2019-02-06	9590-807-0630	ND
2019-05-07	9590-800-1033	ND
2019-05-07	9590-801-1003	ND
2019-05-07	9590-802-1021	ND
2019-05-07	9590-803-0830	ND
2019-05-07	9590-804-0856	1.50 ppb
2019-05-07	9590-805-1137	ND
2019-05-07	9590-806-0741	ND
2019-05-07	9590-807-0725	ND
2019-08-06	9590-800-1113	ND
2019-08-06	9590-801-1051	ND
2019-08-06	9590-802-1102	ND
2019-08-06	9590-803-0933	1.40 ppb
2019-08-06	9590-804-0957	1.60 ppb
2019-08-06	9590-805-1240	ND
2019-08-06	9590-806-0851	ND
2019-08-06	9590-807-0837	ND
2019-11-05	9590-800-1137	1.30 ppb
2019-11-05	9590-801-1110	ND
2019-11-05	9590-802-1126	ND
2019-11-05	9590-803-0937	1.80 ppb
2019-11-05	9590-804-1005	ND
2019-11-05	9590-805-1237	ND
2019-11-05	9590-806-0850	1.20 ppb
2019-11-05	9590-807-0835	ND